package String;

public class Practice2 {
    public static void main(String[] args) {
        StringBuilder builder1=new StringBuilder("a");
        for (int i=0;i<100;i++){
            builder1.append(i);
            System.out.println(builder1);
        }
        System.out.println("finish");




        String str="好好休息吧Java";
        StringBuilder builder=new StringBuilder(str);

        builder.append(",为了找工作");
        System.out.println(builder);

        builder.replace(10,15,"只是为了摸鱼");
        System.out.println(builder);

        builder.delete(0,9);
        System.out.println(builder);

        builder.insert(0,"fish");
        System.out.println(builder);









        /*
        StringBuilder builder1=new StringBuilder();
        StringBuilder builder2=new StringBuilder("abc");

        String str="abc";
        StringBuilder builder3=new StringBuilder(str);
        String str2=builder3.toString();



        StringBuilder builder1=new StringBuilder("a");
        for (int i=0;i<100;i++){
            builder1.append(i);
            System.out.println(builder1);
        }
        System.out.println("finish");




        String str="好好休息吧Java";
        StringBuilder builder=new StringBuilder(str);

        builder.append(",为了找工作");
        System.out.println(builder);

        builder.replace(10,15,"只是为了摸鱼");
        System.out.println(builder);

        builder.delete(0,9);
        System.out.println(builder);

        builder.insert(0,"fish");
        System.out.println(builder);
         */
    }
}
